AECOM
Principal Flood Modeller
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Senior Flood Modeller – Water Business Line (Hybrid, Bristol)
Company Description
"Protect lives and landscapes with AECOM—deliver expert flood risk solutions that safeguard communities and infrastructure.”
Work with us. Change the world.
At AECOM, we’re committed to building a better world. By improving transport, securing energy supplies, ensuring access to clean water, and reshaping landscapes, our work enables communities and businesses to thrive. As the world’s trusted infrastructure consulting firm, we partner globally to tackle the most pressing challenges and create lasting legacies. Now is a perfect time to join us—with global infrastructure investment accelerating, our expertise is in high demand.
We seek forward-thinkers who bring fresh ideas and vision to our teams of nearly 50,000 professionals, including planners, engineers, scientists, digital innovators, and programme managers. Together, we deliver impactful projects worldwide.
“Are you ready to join a team of flood risk specialists and shape the future of the Water Industry?”
Our dynamic Water team is seeking a passionate Senior Flood Modeller to join its rapidly expanding Water Business Line. This role offers the opportunity to engage with high-profile projects across the UK and internationally—while being at the heart of one of the UK’s most innovative and interconnected northern engineering hubs.
In this position, you’ll serve as a senior technical leader, guiding junior team members and shaping our service offerings for local authorities, water companies, and private/public sector clients.
About the Role
At AECOM, you’ll play a pivotal role in delivering high-impact flood modelling and hydrology, working largely under general supervision. Your responsibilities will include:
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Modelling
- Developing and verifying hydraulic models using industry-standard packages like Flood Modeller, TUFLOW, MIKE 11, MIKE 21, HEC-RAS, and ICM for flood risk management projects, flood alleviation schemes, and reservoir assessments.
- Creating and extending water quality models (physico-chemical, biological, bacterial, and chemical) using software such as MIKE, Delft3D, SIMCAT, and ICM.
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Project Delivery
- Scoping and conceptualising flood risk modelling approaches while balancing risk, opportunity, and stakeholder needs.
- Carrying out and reviewing hydrological assessments (e.g., Flood Estimation Handbook, ReFH2, WINFAP).
- Leading and contributing to tenders, from small creative projects to multi-million-pound frameworks.
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Team Development
- Mentoring junior staff to ensure their professional growth and skill development.
- Strengthening relationships with clients and cross-disciplinary teams.
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Compliance and Collaboration
- Staying updated with evolving legislation, guidelines, and best practices.
- Using AECOM’s project management tools to meet quality standards, timelines, and budgets.
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Client-Driven Delivery
- Collaborating closely with clients and specialist engineers to implement fluvial, coastal, surface water, or drainage flood risk management.
AECOM welcomes those who are driven by innovation and passionate about transforming bold ideas into tangible improvements in communities and operational systems.
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Explore our LinkedIn Water page for real-time updates on how AECOM is revolutionising the industry. Join us and be part of lasting change.
Your Future with AECOM
You will join AECOM’s ambitious Water business, boasting an expert team of 700+ professionals in the UK and Ireland. Work across diverse projects—from small-scale initiatives to large-scale advancements—supported by detailed concept-to-completion collaboration with industry-leading engineers and consultants.
AECOM offers flexible hybrid working, a dynamic, inclusive environment, and a career-development ecosystem designed to support your success. Enjoy personalised growth opportunities through:
- Technical practice networks
- AECOM University training programmes
- Flexible volunteering schemes
- A workplace culture that prioritises well-being and balance
We offer flexible working arrangements (including hybrid or part-time) tailored to meet individual needs.
Why Join AECOM?
- Join a trusted infrastructure consultancy driving societal progress.
- Collaborate with industry innovators shaping the future of water management.
- Experience a supportive, inclusive culture where independent thinking fosters collective success.
- Grow your skill set with continuing professional development (CPD) opportunities.
- Enjoy a competitive remuneration package and comprehensive benefits.
Key Responsibilities
-
Largely independent work with strong supervisory support.
- 30% of time spent mentoring junior team members.
- Priority on senior technical deliverables.
Qualifications & Requirements
We seek technically skilled, innovative-minded professionals with:
- Significant experience (proven expertise) in:
- Hydraulic modelling software (e.g., Mike, ICM, SIMCAT, Flood Modeller, TUFLOW).
- Environment Agency flood modeling and flood risk assessment guidelines.
- Hands-on hydrology knowledge relevant to Environment Agency processes.
- Animal welfare awareness required, aligned with the organisation’s policies.
- Entry-level stability risk criteria apply.
A key desire and opportunity will include:
- Contributing to high-profile business capture and delivery projects.
Successful candidates should:
- Expertise in hydraulic modelling tools (forge, Mike-21HD, MIKE 11, HEC-RAS).
- A strong understanding of the RefEH 2 flood risk guidelines—ikomma, -plimmie assessment system knowledge would be advantageous.
Plus, the ability to:
- Excel as both an independent technical lead and as part of agile, multi-disciplinary teams.
- Balance effective management and technical roles with senior stakeholders.
- Inspire and develop more junior staff within the team, ensuring ongoing learning and mentorship.
Key Criteria
- PositivelyGrapevine is our preferred and sliding-scale preferred harm recall provider, which operates post employment assignment. Full details as required.
- Desired today: Must work at least one day per week in Bristol, located at AECOM’s City of Bristol Floor of Rivergate
Application Requirements
We look forward to hearing from passionate “Seniors” with transferable expertise serving their communities. AECOM celebrates **diversity—**we welcome applications from all backgrounds and applicants with disabilities should email (redacted).
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Location & Flexibility
- Primary Location: *UK - Bristol (3 Rivergate)
- Hybrid Work model (1-2 days at our Bristol office preferred).
- Fully home-based work remains an unsuitable alternative due to technical client needs.
Benefits & Environment
- Managing diversity, equity and inclusion as top attributes.
- Helper in schedule process ensures work arrangements suit individual diversity demands.
- Company’s culture advocacy demonstrates purpose and polarisation.
Our Promise
At AECOM, we are committed to creating a world of abundance through: ✅ A culture of equity, diversity and inclusion. ✅ Environmental Social and Governance (ESG) priorities in all our projects. ✅ Inclusive growth and innovative solutions. At the crossroads of engineering and global impact, AECOM provides the resources to turn commitments into real-world outcomes. We also recognise non-traditional paths while facilitating an upwardly-mobile work culture.
#AECOMUK|#LI-RP1|#AECOMUKFLOODMODELLER
This job offer adheres to our security commitments. In-person onsite safety training is mandatory on Day-One for all successful candidates.
About AECOM
AECOM is a Fortune 500 multinational infrastructure consulting firm, offering end-to-end project lifecycle services*. Specialising in transportation, green energy, buildings, water, and environmental solutions, we empower public and private partners to solve complex challenges. Driven by technology, inclusivity, and a commitment to sustainability, AECOM invests in a future where infrastructure and well-being advance together.
Fiscal Year 2024 revenue: $16.1 billion in professional services, ensuring AECOM’s role as a global leader in infrastructure innovation.
Visit aecom.com and follow @AECOM to see how we’re sculpting tomorrow’s world today.
Commitments as a Unified Team
- Diverse & inclusive workplace welcoming professional difference.
- Global influence and collective innovation fostering innovative thinking.
- Hybrid flexibility—Whether onsite at AECOM, remote, or client-based.
- Health-first benefits supporting work and life balance.
Career & Compensation Insights
We believe in growth, earning, and thriving. Prospective hires can expect: ↪ A strategically aligned career plan. ↪ Integral project mentorship and diverse insights. ↪ Aligned opportunities to inspire the next generation of professionals.
AECOM specialises in nurturing talent at every career stage, embedding each into:
Build a better tomorrow for our next decades’ challenges.
Accessibility & Support
Disability Confident Employer: We will offer interviews on the minimum criteria if applicants reveal a disability via (redacted). Accommodations during the application process are available by contacting [redacted].
All responses held secure per EEO guidelines. Success by design: We bring together global talent to redefine infrastructure potential.
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